Theory from an amateur

Watching some pros and some people on YouTube. I have this theory that turning your shoulders as fast as you can is a big key element.
Let's pretend we do not have arms, and we are just trying to turn our shoulders as fast as we can.
At address: push that left shoulder down as hard as you can while pulling that right shoulder back and up towards the sky as you can.
At the top:
Now reverse this and push* that right shoulder down and thru the impact zone and pull that left shoulder up and back towards the sky .
Without even engaging the arms we can get our shoulders to impressive speeds.
One of the keys here is that the pushing and pulling are independent of each other. You must use your muscles to focus on one (pulling) and other muscles to focus on the other (pushing).
Now engage the arms and figure out where they go in your swing.
Musings from an amateur... lol

I sometimes focus on shoulder speed... but a lot of things need to be in place for it to work, and it's never really stayed as a basic feel over time. That doesn't mean it isn't worth while, but just that it seems downstream from a bunch of other basics.

In each case in post #8 the arms are moving faster than the shoulders. If you don't get the arms moving faster than the shoulders, ie. swinging from the shoulder sockets, you're just not going to hit the ball very far. On the other hand, speed in the arms will result in speed in the shoulders.

@Pepperturbo said:
I am more aligned with "Stenson's" belief, proper setup and overall swing and body synchronization. I use my body strength to hit the ball as opposed to being a swinger.

It's Pete cowens teachings as Stensons swing coach. Henrik is struggling so much lately. I dunno if it's stenson or have the new guys eclipsed him.

IMO - when someone makes a career out of golf or another sport he or she is bound to encounter off or dry periods. It's the nature of doing anything for a long time. That also sheds light on the importance and challenge of hanging in there when the going gets tough. No different when running a national company. Some years are fantastic, other years not so good. We learn from them. Not sure youth has much to do with the likes of Stenson or anyone else for that matter. Plus, he's like other tour players, even when they are off the bubble, their still making a dam good living.

Maybe this is some weird golf Rorschach Test but the shoulders dont seem to move that fast.

Here are the similarities i see with those golfers:

they maintain their spine tilt

they get their right shoulder working out to the ball, not down into their side

they finish in balance with the weight on the lead heel

Maybe shoulder path would be a good description? Since the “Gears” system is the new Thing. One could trace how the shoulders or shoulder bones move into position. And how quickly they get there.
And how quickly they unwind in the downswing.
It is a hard area of the body to describe .

I think a bigger issue for mortals is how do you get the body more open at impact. Sequence, geometry, speed are all part of it. Pro's have their shoulders 15-20 degrees more open at contact, they create the space to unload arm speed in the right direction consistently. Not a big deal to swing 110, the big deal is to do it correctly. My sole focus past month is getting shoulder tilt, left & right bend of torso better. In short, holding upper spine center while, turning shoulders on plane. Has greatly improved driving metals & impact of irons but it's still bleeding in. There's a number of adjustments to make to do this right. Getting right shoulder back through to impact is the hardest part of the golf swing in my opinion. There are very few amateurs who do it correctly, I've seen exactly 2 guys in the last few years who do it right.

@Nard_S said:
I think a bigger issue for mortals is how do you get the body more open at impact. Sequence, geometry, speed are all part of it. Pro's have their shoulders 15-20 degrees more open at contact, they create the space to unload arm speed in the right direction consistently. Not a big deal to swing 110, the big deal is to do it correctly. My sole focus past month is getting shoulder tilt, left & right bend of torso better. In short, holding upper spine center while, turning shoulders on plane. Has greatly improved driving metals & impact of irons but it's still bleeding in. There's a number of adjustments to make to do this right. Getting right shoulder back through to impact is the hardest part of the golf swing in my opinion. There are very few amateurs who do it correctly, I've seen exactly 2 guys in the last few years who do it right.

I feel it is like a baseball swing and getting around on a 90mph fastball (the same feeling, different movements) That's how I get open. It's fast, it is jarring and there is a Whip.

Also learning that fitness helps your body not break down and become injured doing this stuff. Definitely do TPI everyone.